The Raspberry Pi sounds cool in concept. I should hope that the demo is unoptimized for now, perhaps the ceiling for the hardware is higher than we anticipate.
We're definitely not done with optimisation, which is why we're not launching right-now-this-minute. You'll be seeing improvements, which we'll be blogging about (we think development's fascinating, and that it's good for people to have a glimpse about what's involved with putting this sort of thing together) all the way up until we launch.
It's way past the 'concept' stage, they've got 50 boards up and running and there are tons of people that would fork over cash today to get themselves one or more of these.
